PB Booster leak?

[69chargerrt]

I've got a issue with my power brakes and the FS manual doesn't cover this....

WHen the engine is at idle (~750rpm), if I apply the brakes the engine sputters and dies. '69 Charger with PB drums, although the booster is meant for a PB disk setup (Bendix- the car apparently had disks in the beginning and someone down the line swapped them out for 10" drums. This will be rectified someday....) Also, the PB booster had been professionally rebuilt- about 10 years ago :/

It's sounding like to me that I've got a leak somewhere in the booster but it only happens when I apply the brakes- otherwise the engine idles ok (not great though IMO).

Has anyone run into this issue before? Any ideas as to what could cause this?

[472 R/T SE]

What about plugging off the vacuum hose ahead of time?

[69chargerrt]

What about plugging off the vacuum hose ahead of time?

Tried that- the car runs fine with the vacuum hose disconnected and the intake manifold connection plugged.   I could stomp on the brake pedal all day with no effect.

I went ahead and pulled the booster out of the car and sent it off for a rebuild- it's a Bendix unit and I found out that if the previous rebuilders didn't reassemble the shell correctly then whenever the pedal is pressed, it could flex the booster halves and leak.    My guess is that's what's happening....

[472 R/T SE]

Did you send it to Booster Dewey?

[69chargerrt]

Did you send it to Booster Dewey?

As a matter of fact- yes

[472 R/T SE]

You done good.  He's the best in the business.  I'm lucky as he's local.